G'day, thanks for your interest in how we calculate an experience's ranking score. It's at the core of Rankers so I'm pleased you're curious.
The ranking score percentage is used to compare and sort experiences in ranking tables. It is not necessarily a direct measurement of the quality of a particular experience as rated by its customers. I've found it a useful tool to allow me to find the best experiences with confidence. But I've also found it important to read the customer reviews before making any final judgements!
We calculate an experience's ranking score using a multi-factor data model instead of a raw data average (mean). This model takes into account several important questions. For instance - is there a trusted body of reviews? What is the age of a review and is the review from a credible source?
Below you'll find details around some of the important factors that went into calculating the ranking score for Waitomo Glowworm Caves.
If you have any questions or comments about our ranking score calculation please get in touch at info@rankers.co.nz. We don't believe this is perfect or complete so we're always interested in ways we might make improvements.
Waitomo Glowworm Caves
Valid Reviews
290 Valid Reviews
The Waitomo Glowworm Caves experience has a total of 291 reviews. There are 290 valid reviews that are included when calculating the ranking score and 1 invalid review that are excluded from the calculation. Reviews can be excluded only when a reviewer is not verified or after an investigation by our team determines the reviewer is not genuine.
Below is the distribution of ratings for the 290 valid reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 36 |
|
12% |
| 9/10 | 52 |
|
18% |
| 8/10 | 81 |
|
28% |
| 7/10 | 66 |
|
23% |
| 6/10 | 22 |
|
8% |
| 5/10 | 13 |
|
4% |
| 4/10 | 8 |
|
3% |
| 3/10 | 5 |
|
2% |
| 2/10 | 4 |
|
1% |
| 1/10 | 3 |
|
1% |
75.62% Average
The raw data average (mean) for all the Waitomo Glowworm Caves valid reviews is 75.62% and is based on 290 valid reviews. This value is not used to calculate the ranking score and it only provided here as a comparison to the weighted average.
Face-to-Face Reviews
263 Face-to-Face Reviews
The Rankers team meets with travellers while they’re in New Zealand and conducts face-to-face surveys. These reviews, in our opinion, are the most trusted in the industry and represent a critical control sample. To our knowledge, we are the only travel review website in the world that has gone to this extent.
More about face-to-face reviews
Within the 290 valid reviews, the experience has 263 face-to-face reviews collected during interviews by our team.
Below is the distribution of ratings for the 263 face-to-face reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 29 |
|
11% |
| 9/10 | 49 |
|
19% |
| 8/10 | 76 |
|
29% |
| 7/10 | 57 |
|
22% |
| 6/10 | 21 |
|
8% |
| 5/10 | 13 |
|
5% |
| 4/10 | 7 |
|
3% |
| 3/10 | 5 |
|
2% |
| 2/10 | 4 |
|
2% |
| 1/10 | 2 |
|
1% |
75.36% Average
The raw data average (mean) for all the Waitomo Glowworm Caves face-to-face reviews is 75.36% and is based on 263 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.
Weighted Average
75.91%
Rankers calculates a weighted mean as a base average on which we can improve. Individual review's ratings are given a weight based on several factors. The weight of a review determines the overall impact it'll have on the final weighted average.
Recent reviews have more weight as they are more relevant and reflect the experience as it currently operates. Over time reviews become less relevant and loose their impact on the ranking score.
Low rating reviews carry slightly less weight. This dampens the effect of very low ratings for every experience across the board. This is especially important when the experience has few reviews overall and a single negative rating can grossly mischaracterise an experience. Consistent poor reviews will still result in the experience receiving a comparitively low ranking score.
Credible sources provide reviews that can be trusted. If we have verified a reviewer is genuine via a face-to-face meeting then the review carries additional weight.
| Reviewer | Rating | Age | Relative Weight |
|---|---|---|---|
| Somysolanki | 7/10 | 527 days | 100% |
| Anne | 7/10 | 862 days | 68% |
| ros fraser | 4/10 | 2872 days | 2% |
| wynden | 1/10 | 2900 days | 1% |
| Rado Hank | 10/10 | 2987 days | 3% |
| Lizzie Edmonds | 8/10 | 2988 days | 3% |
| Anis Quentin | 7/10 | 2995 days | 3% |
| Jeny Smolders | 7/10 | 2999 days | 3% |
| Oscar Petersen | 8/10 | 3006 days | 3% |
| Ani | 9/10 | 3115 days | 3% |
| Martin Murlik | 8/10 | 3227 days | 3% |
| Laura | 9/10 | 3238 days | 3% |
| Melanie Farrell | 7/10 | 3246 days | 3% |
| Andy | 10/10 | 3253 days | 3% |
| Julia Achatz | 5/10 | 3267 days | 2% |
| Auba Mateos | 7/10 | 3273 days | 3% |
| Charlotte | 7/10 | 3273 days | 3% |
| Isabel Zedelius | 8/10 | 3276 days | 3% |
| Dries | 8/10 | 3316 days | 3% |
| Clarissa Glaser | 8/10 | 3317 days | 3% |
| Alna | 10/10 | 3322 days | 3% |
| Holger Worner | 9/10 | 3322 days | 3% |
| Karlee Hormell | 9/10 | 3331 days | 3% |
| Alonso | 9/10 | 3335 days | 3% |
| Rose Guillaume | 8/10 | 3338 days | 3% |
| Caroline Coudray | 8/10 | 3342 days | 3% |
| Barbara | 8/10 | 3342 days | 3% |
| Leonie Brabers | 7/10 | 3350 days | 2% |
| Bina Johansson | 10/10 | 3350 days | 3% |
| Sam Staines | 9/10 | 3354 days | 3% |
| Erik | 6/10 | 3357 days | 2% |
| Nicole Signer | 8/10 | 3364 days | 2% |
| Sam Taylor | 7/10 | 3368 days | 2% |
| Vanuxem | 8/10 | 3572 days | 2% |
| Clara Bertomeu | 10/10 | 3572 days | 2% |
| Lukas Boller | 9/10 | 3574 days | 2% |
| Mette Elholm | 7/10 | 3588 days | 2% |
| Mathilde Arp | 8/10 | 3588 days | 2% |
| Chloe and Guillame | 9/10 | 3592 days | 2% |
| Andre | 9/10 | 3594 days | 2% |
| Doerte | 10/10 | 3594 days | 2% |
| Saskia Peek | 9/10 | 3595 days | 2% |
| Erika Tarant | 8/10 | 3595 days | 2% |
| Jennifer Nguyen | 7/10 | 3596 days | 2% |
| Julie Duvert | 7/10 | 3596 days | 2% |
| Dan Ramsl | 4/10 | 3596 days | 1% |
| Lucy Mulvin | 7/10 | 3597 days | 2% |
| Fine Kochling | 9/10 | 3599 days | 2% |
| Eberhard | 9/10 | 3599 days | 2% |
| Hannes | 8/10 | 3600 days | 2% |
| Calum Penn | 9/10 | 3602 days | 2% |
| Arthur Portolleau | 6/10 | 3603 days | 2% |
| Elisabet | 10/10 | 3604 days | 2% |
| Tommy Mannien | 8/10 | 3605 days | 2% |
| Solange Bourbeois | 8/10 | 3608 days | 2% |
| Talissa Missiato | 10/10 | 3608 days | 2% |
| Severin Knegsch | 9/10 | 3609 days | 2% |
| Pierre Jouffineau | 10/10 | 3610 days | 2% |
| Lewis Whittle | 8/10 | 3612 days | 2% |
| Ben and Pauline | 8/10 | 3614 days | 2% |
| Ann-Kathrin | 7/10 | 3619 days | 2% |
| Natasha Harbinson | 10/10 | 3620 days | 2% |
| Sebastian | 2/10 | 3621 days | 1% |
| Jaquein Bucholz | 3/10 | 3621 days | 1% |
| Chiara | 7/10 | 3621 days | 2% |
| Cariotta Kemper | 3/10 | 3621 days | 1% |
| Megan Lenox | 7/10 | 3624 days | 2% |
| Max Mustermann | 8/10 | 3626 days | 2% |
| Amy Stafford | 8/10 | 3629 days | 2% |
| Carl | 7/10 | 3629 days | 2% |
| Briony | 7/10 | 3631 days | 2% |
| Melanie Kronbichler | 8/10 | 3632 days | 2% |
| Andreas Schiefer | 7/10 | 3633 days | 2% |
| Veronique Kaplan | 3/10 | 3635 days | 1% |
| Robin Ings | 6/10 | 3636 days | 2% |
| Stula Vladimir | 7/10 | 3637 days | 2% |
| David Soukal | 8/10 | 3637 days | 2% |
| Olivia Aliprandi | 7/10 | 3638 days | 2% |
| Isabelle | 2/10 | 3640 days | 1% |
| Jonathan Gourmel | 8/10 | 3640 days | 2% |
| Mikkel Palleson | 4/10 | 3643 days | 1% |
| Franziska and Sabine | 7/10 | 3644 days | 2% |
| Chloe Guerillot | 7/10 | 3644 days | 2% |
| Faye Oliver | 7/10 | 3646 days | 2% |
| Iris Kerbler | 9/10 | 3646 days | 2% |
| Til Schaebitz | 6/10 | 3647 days | 2% |
| Elisabeth Grabner | 9/10 | 3649 days | 2% |
| Berith | 10/10 | 3649 days | 2% |
| Chris Simpson | 6/10 | 3652 days | 2% |
| Pekka and Jonna | 9/10 | 3652 days | 2% |
| Jonas Hoerning | 8/10 | 3653 days | 2% |
| Nils | 10/10 | 3653 days | 2% |
| Mark Rosema | 8/10 | 3654 days | 2% |
| Lisa Huber | 10/10 | 3654 days | 2% |
| Nicola Wiggan | 9/10 | 3675 days | 2% |
| Linda and Gunther | 4/10 | 3676 days | 1% |
| Julie | 9/10 | 3677 days | 2% |
| Maria Schaer | 7/10 | 3681 days | 2% |
| Mette and Jesper | 5/10 | 3683 days | 1% |
| Pierre and Alexandra | 6/10 | 3689 days | 1% |
| Julia Waenninger | 8/10 | 3701 days | 2% |
| Sarah Boettcher | 9/10 | 3737 days | 2% |
| Suzanne Vermeulen | 6/10 | 3754 days | 1% |
| Blandine Giusti | 7/10 | 3957 days | 1% |
| Bart Hanssen | 6/10 | 4036 days | 1% |
| Astrid Egesten | 7/10 | 4088 days | 1% |
| Jean Curry | 9/10 | 4311 days | 0% |
| Carla Oyarzun | 1/10 | 4315 days | 0% |
| Philippe Chiasson | 9/10 | 4321 days | 0% |
| Helma Druyken | 4/10 | 4331 days | 0% |
| Florian Guttler | 7/10 | 4334 days | 0% |
| Casandra Prunica | 8/10 | 4335 days | 0% |
| Lauren Hedley | 7/10 | 4335 days | 0% |
| Janina Zwerver | 8/10 | 4335 days | 0% |
| Marieke Feyteres | 4/10 | 4339 days | 0% |
| van Linda Werner | 5/10 | 4339 days | 0% |
| Philip Donachie | 7/10 | 4349 days | 0% |
| Luisa Bach | 8/10 | 4349 days | 0% |
| Kristina | 7/10 | 4351 days | 0% |
| Eugen Lehner | 6/10 | 4352 days | 0% |
| Manuel Bach | 7/10 | 4352 days | 0% |
| Matthias Freiling | 2/10 | 4359 days | 0% |
| Debora Grusler | 6/10 | 4362 days | 0% |
| Andreas Brodhaeker | 8/10 | 4375 days | 0% |
| Renee van der Syde | 7/10 | 4376 days | 0% |
| Martha Horst | 8/10 | 4376 days | 0% |
| Roland Beer | 7/10 | 4380 days | 1% |
| Johanna Bak | 4/10 | 4380 days | 1% |
| Lior Bakski | 9/10 | 4390 days | 1% |
| Bet | 9/10 | 4391 days | 1% |
| Memain | 8/10 | 4664 days | 1% |
| Konza | 7/10 | 4665 days | 1% |
| Steen Rausmussen | 8/10 | 4696 days | 1% |
| David Restell | 10/10 | 4726 days | 1% |
| Christina Rodewald | 9/10 | 4731 days | 1% |
| Hanneke P | 7/10 | 4757 days | 1% |
| Kohler | 9/10 | 4777 days | 1% |
| Alexandra van den Brack | 6/10 | 4785 days | 1% |
| Paul Lawrence | 9/10 | 4786 days | 1% |
| Abby Rushmer | 7/10 | 4787 days | 1% |
| Stephan Olivier | 7/10 | 4792 days | 1% |
| Stephan Olivier | 7/10 | 4792 days | 1% |
| Faassen | 8/10 | 4796 days | 1% |
| Julie Lamart | 8/10 | 4797 days | 1% |
| Adrian Weidell | 5/10 | 4993 days | 1% |
| Jonathan Tuthill | 9/10 | 5048 days | 1% |
| A Ormsby | 10/10 | 5060 days | 1% |
| Gillian Rowe | 10/10 | 5073 days | 1% |
| Ryan Pynappels | 8/10 | 5074 days | 1% |
| Peter Dellen | 8/10 | 5075 days | 1% |
| Jorg Steffens | 8/10 | 5075 days | 1% |
| Danielle & Jobbe | 9/10 | 5077 days | 1% |
| Christina | 6/10 | 5078 days | 1% |
| Jop Veldhuis | 7/10 | 5078 days | 1% |
| Paul Weidenfeld | 8/10 | 5079 days | 1% |
| Sophie Dorrepaal | 7/10 | 5079 days | 1% |
| Fannette Peyreplane | 5/10 | 5080 days | 1% |
| Norm Cooper | 7/10 | 5084 days | 1% |
| Gloria, Rose & An | 8/10 | 5084 days | 1% |
| A Sorg | 10/10 | 5084 days | 1% |
| Samplonius | 5/10 | 5087 days | 1% |
| Petra | 10/10 | 5087 days | 1% |
| Bethany Hamilton | 8/10 | 5091 days | 1% |
| suffolkhouse69 | 9/10 | 5092 days | 1% |
| a a | 8/10 | 5123 days | 1% |
| Julia Balionis | 7/10 | 5137 days | 1% |
| Julia Hartman | 3/10 | 5138 days | 1% |
| Fabienne Indergand | 7/10 | 5158 days | 1% |
| Waldemar Schuler | 9/10 | 5170 days | 1% |
| pepette31 | 7/10 | 5245 days | 1% |
| Craig Hathaway | 9/10 | 5397 days | 1% |
| Stephane Lebel | 9/10 | 5402 days | 1% |
| Rens Hemselmans | 7/10 | 5415 days | 1% |
| Isabell | 10/10 | 5417 days | 1% |
| Holly Cave | 5/10 | 5417 days | 1% |
| J Palmer | 6/10 | 5421 days | 1% |
| Liz & Jim | 10/10 | 5423 days | 1% |
| Edgar & Marilyn Berry | 9/10 | 5425 days | 1% |
| Simon Vickers | 2/10 | 5428 days | 1% |
| Leslie | 8/10 | 5441 days | 1% |
| Jean-Francois Guilbault | 8/10 | 5442 days | 1% |
| Selina Mueller | 7/10 | 5443 days | 1% |
| Tamlin Barton | 3/10 | 5444 days | 1% |
| Cara Dungay | 8/10 | 5445 days | 1% |
| Bottcher | 10/10 | 5445 days | 1% |
| Alexandra | 10/10 | 5446 days | 1% |
| Philipp Rau | 7/10 | 5448 days | 1% |
| Dan Aldridge | 9/10 | 5450 days | 1% |
| John Allen | 8/10 | 5452 days | 1% |
| Curtis Penner | 8/10 | 5452 days | 1% |
| Brandt | 8/10 | 5454 days | 1% |
| Nadia Husain | 5/10 | 5457 days | 1% |
| T J Andrews | 6/10 | 5473 days | 1% |
| Charli Skinner | 7/10 | 5724 days | 1% |
| Carl_Larsen | 10/10 | 5733 days | 1% |
| Susan & Richard | 10/10 | 5794 days | 1% |
| Rik | 9/10 | 5795 days | 1% |
| Jonathan Martin | 7/10 | 5797 days | 1% |
| Gunda G | 9/10 | 5802 days | 1% |
| Aaron | 8/10 | 5804 days | 1% |
| Will Jemma | 6/10 | 5807 days | 1% |
| Christen Hans | 10/10 | 5808 days | 1% |
| Monica and Danie. | 7/10 | 5816 days | 1% |
| Stephen | 5/10 | 5818 days | 1% |
| Susan | 10/10 | 5818 days | 1% |
| snodge | 8/10 | 5822 days | 1% |
| Bo Moenstead | 9/10 | 5831 days | 1% |
| Alain Deslandres | 8/10 | 5835 days | 1% |
| Jakob Jurgen | 10/10 | 5836 days | 1% |
| EA Anders | 8/10 | 5839 days | 1% |
| Helen and Hans Walser | 1/10 | 5842 days | 1% |
| kevinp | 8/10 | 5865 days | 1% |
| warrenp | 9/10 | 5869 days | 1% |
| braunweiler | 9/10 | 5873 days | 1% |
| pimn | 9/10 | 5878 days | 1% |
| asiacritics | 7/10 | 5884 days | 1% |
| Chris Mackamul | 8/10 | 5891 days | 1% |
| Debbie Rathbone | 10/10 | 5891 days | 1% |
| Lisette X | 9/10 | 5892 days | 1% |
| Martin | 10/10 | 5894 days | 1% |
| Thomas Willi | 10/10 | 5894 days | 1% |
| Elodie | 7/10 | 5895 days | 1% |
| richardh | 7/10 | 6009 days | 1% |
| trvlbug | 8/10 | 6037 days | 1% |
| glennandjen | 10/10 | 6098 days | 1% |
| BryonyS | 9/10 | 6116 days | 1% |
| Marion | 9/10 | 6132 days | 1% |
| Mikey | 7/10 | 6133 days | 1% |
| Richard Komzik | 6/10 | 6134 days | 1% |
| Michael Walsall | 10/10 | 6138 days | 1% |
| Anna | 8/10 | 6152 days | 1% |
| Abigail | 7/10 | 6152 days | 1% |
| lannie | 7/10 | 6162 days | 1% |
| SimonR | 8/10 | 6162 days | 1% |
| SonjaG | 7/10 | 6162 days | 1% |
| Chris | 8/10 | 6168 days | 1% |
| AurelieD | 8/10 | 6175 days | 1% |
| Yunker | 10/10 | 6176 days | 1% |
| Andrew | 8/10 | 6179 days | 1% |
| Erin | 9/10 | 6179 days | 1% |
| Christopher Gallaga | 8/10 | 6184 days | 1% |
| Amy | 10/10 | 6190 days | 1% |
| Shona | 8/10 | 6190 days | 1% |
| plumbaum | 9/10 | 6193 days | 1% |
| Sandra | 10/10 | 6200 days | 1% |
| Evangelista | 8/10 | 6200 days | 1% |
| Oliver | 5/10 | 6202 days | 1% |
| Kat | 9/10 | 6232 days | 1% |
| Lisa | 8/10 | 6260 days | 1% |
| siobhan | 8/10 | 6262 days | 1% |
| Alice | 8/10 | 6262 days | 1% |
| NORTZ | 7/10 | 6290 days | 1% |
| Stefan | 8/10 | 6292 days | 1% |
| Hugh Trenchard | 9/10 | 6308 days | 1% |
| Niamh | 4/10 | 6315 days | 1% |
| Jenny | 9/10 | 6339 days | 1% |
| Louise | 8/10 | 6348 days | 1% |
| Peddy | 10/10 | 6357 days | 1% |
| Katie Wise | 8/10 | 6361 days | 1% |
| Thomas Bachmann | 8/10 | 6377 days | 1% |
| Daniala | 8/10 | 6396 days | 1% |
| Tom Ben | 9/10 | 6499 days | 1% |
| Sarah Maudsley | 8/10 | 6514 days | 1% |
| Alan Bellerby | 8/10 | 6514 days | 1% |
| Tina Daly | 5/10 | 6520 days | 1% |
| John Woodrow | 8/10 | 6529 days | 1% |
| Ernst Seter | 9/10 | 6529 days | 1% |
| Jim Curley | 7/10 | 6540 days | 1% |
| Daniel | 7/10 | 6541 days | 1% |
| Marc Hertogs | 7/10 | 6544 days | 1% |
| Laura Sutton | 5/10 | 6568 days | 1% |
| Jeroen | 5/10 | 6570 days | 1% |
| Mum! | 6/10 | 6570 days | 1% |
| Gail | 9/10 | 6574 days | 1% |
| Heike Julia | 6/10 | 6575 days | 1% |
| Lanni | 8/10 | 6575 days | 1% |
| Amanda Finger | 7/10 | 6576 days | 1% |
| Desiree Muri | 7/10 | 6576 days | 1% |
| Jan Grzejik | 8/10 | 6603 days | 1% |
| Wouter Ewalts | 8/10 | 6610 days | 1% |
| Matilde | 6/10 | 6618 days | 1% |
| Kim | 6/10 | 6815 days | 1% |
| Gillian | 8/10 | 6857 days | 1% |
| Denise Nick | 6/10 | 6867 days | 1% |
| ranker_110 | 8/10 | 6886 days | 1% |
| Jasper | 7/10 | 6893 days | 1% |
| Mary | 8/10 | 6893 days | 1% |
| Lucy | 6/10 | 6893 days | 1% |
| Lukas | 8/10 | 6904 days | 1% |
| Hanna | 7/10 | 6906 days | 1% |
Adjustments
Several adjustments to the weighted average are added to improve relevancy and credibility. These adjustments apply equally to all experiences that meet the criteria.
Sample Size Adjustment
No Adjustment
A reasonable number of reviews are necessary in order for the average to be credible and for an experience to take a prime position within the ranking tables. As such, experiences with only a few reviews have a moderated score. This does not mean that the experience or the reviews can't be trusted. The Waitomo Glowworm Caves experience has plenty of reviews and does not meet the criteria for any adjustment.
Recent Reviews Adjustment
-4.05% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 44 days. However the Waitomo Glowworm Caves experience does not meet the criteria for any adjustment.
In addition, an experience's ranking score may be adjusted for each day there is no new ranking. After 1 day the adjustment comes into effect. The maximum number of days that can be adjusted for is 200 days. Due to the seasonal nature of many businesses, this adjustment is applied dynamically throughout the year.
The Waitomo Glowworm Caves experience has been adjusted for 200 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 197 | -3.99% |
| 198 | -4.01% |
| 199 | -4.03% |
| 200 | -4.05% |
| 201 | -4.07% |
| 202 | -4.09% |
| 203 | -4.11% |
| … | … |
Balancing Adjustment
6.03% Adjustment
Every experience's review score is adjusted to balance out the disproportional number of negative reviews that are contributed.
You won't be surprised to learn that disgruntled customers are more likely to leave a review than happy ones. They are motivated to share their experience and warn others. We consider this a good thing and it's why reading the reviews is important. However we've learned it can misrepresent the experience in a more overall sense.
We apply a balancing adjustment to counteract this effect and ensure the ranking score is a more fair representation of the experience. This adjustment is applied equally to all experiences.
Final Ranking Score
78%
The final ranking score once any adjustments, ratings, and rounding has been applied. This value is recalculated each day and a short rolling average is applied. Therefore it may not be precisely accurate based on the other values presented.